“氨的”造句

氨的合成主要经过四道工序.
There are four major steps in ammonia synthesis.

试计算氮在尿素及硫酸氨的质量百分率.
Calculate the percentage by mass of nitrogen in urea and ammonium sulphate.

这种肥料经过化验表明氨的含量很高.
Tests of the manure showed a high ammonia content.

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